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I am doing research on watermelon and pumpkin. I have developed new methods for producing seedless watermelon. One is method for producing seedless watermelon in diploid plants using soft-X-irradiated pollen(Sci. Hortic. 2000. 84: 255-264). Also, I found a new method to produce seedless watermelon by pollinating with bottle gourd (Lagenaria siceraria (Molina) Standl.) pollen (Sci. Hortic. 2014. 171: 1-5).

Published Papers

Pollination with soft-X-irradiated pollen caused the disappearance of almost all complete seeds in harvested fruit, resulting in the transformation into empty seeds, in 7 persimmon cultivars: 'Fuyu', 'Matsumoto-Wase-Fuyu', 'Izu', 'Taishuu', 'Maeka...

<p>We aimed to characterize the inheritance of HEPX (heptachlor exo-epoxide) uptake ability in summer squash (Cucurbita pepo L.). Crosses between 'Patty Green', a cultivar that cannot take up HEPX, and 'Toyohira 2', a cultivar that can take...

In order to evaluate the reliability of using bottle gourd (Lagenaria siceraria (Molina) Standl.) pollen to produce seedless watermelon, the fruit set rate and qualities of fruits obtained via parthenocarpy using the watermelon cultivar 'Fu...

We investigated the effects of nitrogen fertilization rate and the timing of fertilization on the growth, fruit yield and fruit quality of the short-internode squash cultivar Cucurbita maxima Duchesne 'TC2A' based on experiments performed i...

The objective of this study is to establish a cryopreservation protocol for shoot apices of Cardamine yezoensis. Cryopreservation was carried out using a vitrification method on shoot apices excised from in vitro cultures. Plant Vitrification Solu...

The objective of this study was to establish a cryopreservation protocol for shoot apices of cranberry (Vaccinium macrocarpon Ait. cv. Early Black) and highbush blueberryn (V. corybossum L. cv. Rancoccas). Cryopreservation was carried out via enca...

Diploid seedless watermelons are presently produced by pollination with partially inactivated (soft X-ray irradiated) pollen. Bud pollination on the day preceding flowering was tested as a means of reducing labor in seedless watermelon production....

We developed a simple and effective method for measuring concentrations of α-carotene, β-carotene and lycopene in acetone extracts of common carrots and Kintoki red carrots. This method utilizes the differences in visible absorption spectra for e...

Journal of the Japanese Society for Horticultural Science 69(6) 684-689 Nov 2000

We compared the differences in number of seeds, size of normal and empty seeds, and fruit quality of seedless fruit induced by soft-X-irradiated pollen to determine which cultivars are best suited for breeding and producing high quality seedless w...

This study was carried out to analyze the inheritance of watermelon rind hardness and the relationship between rind tissue structure and rind hardness for breeding crack resistant cultivars. For inheritance analysis, a crack-prone cultivar, 'Beni ...

Journal of the Japanese Society for Horticultural Science 67(2) 185-189 Mar 1998

Watermelon cultivars with high female flower bearing ability bore the first female flower at a lower node than those with low female flower bearing ability, when sprayed with silver thiosulfate, STS, at the cotyledonary stage or at the first true ...

Induction of somatic embryos from mature seed of melon (Cucumis melo. L.) was conducted on media solidified with gelrite. The most reproducible result was obtained with rhombic explant consisted of radicle, hypocotyl, and a promixal part of cytole...

Induction of somatic embryos from mature seed of melon (Cucumis melo. L.) was conducted on media solidified with gelrite. The most reproducible result was obtained with rhombic explant consisted of radicle, hypocotyl, and a promixal part of cytole...